do not drink alcohol in excess with cialis. side effects may include headache, upset stomach, delayed backache or muscle ache. to avoid long-term injury, seek immediate medical help for an erection lasting more than four hours. if you have any sudden decrease or loss in hearing or vision, or if you have any allergic reactions such as rash, hives, swelling of the lips, tongue or throat, or difficulty breathing or swallowing, stop taking cialis and get medical help right away. ask your doctor about cialis for daily use and a 30-tablet free trial. to the number 1 club in the world. the potential of manchester united unlocked. nyse euronext. unlocking the world's potential. >>> we are back with tonight's outer circle, where we reach out to our sources all around the world. and we want to start in sudan's darfur region. that's where the government officials there say that a captured vulture is part of an israeli spy mission. nema al bagger is following the story for us. and i asked her, just what evidence do the sudanese officials h